HFCO-1233zd Drying Composition for Water Displacement Stability
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Solution Overview
Problem
Existing solvent-surfactant compositions for drying and water displacement face challenges in predicting surfactant compatibility with hydrochlorofluorocarbons, hydrofluorocarbons, and other solvents, as well as stability issues, particularly with halogenated olefins, which are reactive and difficult to combine effectively for efficient oil removal and emulsion prevention.
Innovation Solution
A composition comprising 1-chloro-3,3,3-trifluoropropene (HFCO-1233zd) with at least one alcohol, such as methanol, ethanol, or isopropanol, is used to effectively displace water from substrates, with the alcohol present in 1-50 weight percent and HFCO-1233zd in at least 50 weight percent, ensuring stability and solvency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If halogenated olefin solvents (e.g., HFCO-1233zd) are used for water displacement, then solvency and environmental compatibility are improved, but chemical stability deteriorates due to the reactive nature of olefins
Solution Approach 1:
The patent introduces a specific surfactant as an intermediary substance that mediates between the reactive HFCO-1233zd solvent and the substrate. This surfactant stabilizes the system by preventing unwanted reactions while maintaining the solvent's effectiveness for water displacement and oil removal.
Solution Approach 2:
The patent optimizes the concentration parameters of both HFCO-1233zd and the surfactant to achieve a stable composition. By carefully controlling the ratio and amounts of components, the system maintains chemical stability while preserving the reactive solvent's cleaning and displacement capabilities.
2Productivity
If surfactants are added to enhance oil removal, then cleaning effectiveness is improved, but emulsion formation increases which hinders drying
Solution Approach 1:
The patent selects a surfactant that would normally be expected to form emulsions, but through careful formulation with HFCO-1233zd, the system converts this potential harm into a benefit. The surfactant effectively removes oils while the specific solvent-surfactant combination prevents stable emulsion formation, allowing rapid drying.
Solution Approach 2:
The patent creates a composite solvent-surfactant system where HFCO-1233zd and the surfactant work synergistically. This composite composition achieves both effective oil removal and prevention of stable emulsion formation, resolving the contradiction between cleaning effectiveness and drying performance.
3Productivity
If CFC-based solvent-surfactant compositions are used, then water displacement performance is improved, but environmental compatibility deteriorates
Solution Approach 1:
The patent replaces CFC solvents with HFCO-1233zd, changing the chemical composition parameters to achieve environmental compatibility. The formulation maintains effective water displacement performance while eliminating the environmental hazards associated with CFCs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition efficiently displaces water from various substrates without forming stable emulsions, achieving rapid drying and minimizing surfactant residue, suitable for metals, glass, ceramics, and other materials, while maintaining stability and solvency properties.
Implementation Method 1
a halocarbon solvent and a hydrophobic surfactant may be used to displace water from a water-laden surface
Implementation Method 2
the surfactant will preferably aid in the removal of the soils that would otherwise only be sparingly soluble in such solvents
Data Source
AI summary
The invention provides solvent and cleaning compositions comprising an ionic surfactant, which preferably has a fluorinated portion thereof, and a solvent selected from hydrofluoro- and/or hydrochlorofluoro-olefins. Additionally, the invention provides drying, dry cleaning, and soil repellency compositions containing a hydrofluoro- or hydrochlorofluoro-olefin and said surfactant. Additionally, the invention provides drying compositions containing a hydrofluoro-olefin or hydrochlorofluoro-olefin and an alcohol such as methanol, ethanol or isopropanol.